CVE-2025-60685
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-11-13

Last updated on: 2025-11-17

Assigner: MITRE

Description
A stack buffer overflow exists in the ToToLink A720R Router firmware V4.1.5cu.614_B20230630 within the sysconf binary (sub_401EE0 function). The binary reads the /proc/stat file using fgets() into a local buffer and subsequently parses the line using sscanf() into a single-byte variable with the %s format specifier. Maliciously crafted /proc/stat content can overwrite adjacent stack memory, potentially allowing an attacker with filesystem write privileges to execute arbitrary code on the device.
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Meta Information
Published
2025-11-13
Last Modified
2025-11-17
Generated
2026-06-16
AI Q&A
2025-11-13
EPSS Evaluated
2026-06-15
NVD
CVE-2025-60685
EUVD
EUVD-2025-175311
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
totolink a720r_firmware 4.1.5cu.614_b20230630
totolink a720r *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
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Executive Summary

This vulnerability is a stack buffer overflow in the ToToLink A720R Router firmware version V4.1.5cu.614_B20230630, specifically in the sysconf binary's sub_401EE0 function. The binary reads data from the /proc/stat file into a local buffer using fgets(), then parses it with sscanf() into a single-byte variable using the %s format specifier. If the /proc/stat content is maliciously crafted, it can overwrite adjacent stack memory, leading to a buffer overflow.

Impact Analysis

An attacker with filesystem write privileges can exploit this vulnerability by providing malicious content in the /proc/stat file, causing a stack buffer overflow. This can potentially allow the attacker to execute arbitrary code on the device, which may lead to unauthorized control or compromise of the router.

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